feat: Agent CLI 与终端审计回放全面优化

- Agent CLI: 多轮对话、SSH 长连接、流式推理、Evolver 按用户隔离、历史侧栏
- 终端审计: 回放播放器、命令书签、筛选分页导出、命令输出统计、录制落盘修复
- 修复 session_commands 表迁移、Kill 竞态导致录制丢失、无录制会话回放提示
- 审计历史页只读（移除删除），移除回放弹框录制搜索

frontend/src/locales/en-US.json

@@ -620,6 +620,7 @@
       "noHistory": "No history sessions",
       "noCommands": "No command records",
       "totalCommands": "{{count}} commands",
+      "showingLoaded": "{{loaded}} loaded",
       "virtualScroll": "virtual scroll",
       "autoRefresh": "Auto Refresh",
       "autoRefreshHintOn": "Auto-refresh every {{sec}}s · click to disable",
@@ -630,6 +631,40 @@
       "liveMonitor": "Live Monitor",
       "replay": "Replay",
       "downloadRecord": "Download Recording",
+      "replayAtCommand": "Replay from command",
+      "filterUsername": "Username",
+      "presetToday": "Today",
+      "preset7d": "Last 7 days",
+      "preset30d": "Last 30 days",
+      "hasRecordOnly": "With recording only",
+      "applyFilter": "Filter",
+      "totalSessions": "{{count}} sessions",
+      "deleteTitle": "Delete Session",
+      "deleteConfirm": "Delete session #{{id}}? Recording will be removed.",
+      "deleted": "Deleted",
+      "deleteFailed": "Delete failed",
+      "batchDelete": "Batch delete",
+      "batchDeleteConfirm": "Delete {{count}} selected sessions?",
+      "batchDeleted": "Batch deleted",
+      "exportFailed": "Export failed",
+      "exportReport": "Export report",
+      "exportReportCsv": "Export CSV",
+      "exportCommands": "Export commands",
+      "exportCommandsCsv": "Export commands CSV",
+      "replayPlayer": {
+        "title": "Terminal Replay #{{id}}",
+        "desc": "Replay recorded terminal session",
+        "noRecord": "No recording data for this session",
+        "loadFailed": "Failed to load recording",
+        "legacyFormat": "Legacy format — static display only",
+        "commands": "Command bookmarks",
+        "searchCommand": "Search commands...",
+        "noCommands": "No commands recorded",
+        "toStart": "Jump to start",
+        "toEnd": "Jump to end",
+        "restart": "Restart playback",
+        "clientIp": "Client IP"
+      },
       "tab": {
         "active": "Active Sessions",
         "history": "History Sessions",
@@ -647,7 +682,8 @@
         "actions": "Actions",
         "command": "Command",
         "outputSize": "Output Size",
-        "sessionRef": "Session"
+        "sessionRef": "Session",
+        "recordSize": "Recording Size"
       },
       "status": {
         "active": "Active",